For awhile now, every time I open FireFox, the menu icon bar and bookmarks bar have switched positions so that the menu icon bar is immediately above the tabs, and the bookmarks bar is above that, instead of the other way around (see screenshot). If I open customize, and then close it, without changing anything, they switch places and go back to where they should be (bookmarks bar above the tabs, menu icon bar above that), but it's annoying to have to do this every time I use FF. I only have one extension related to menu bars, Tabs on Bottom, and I deactivated it and rebooted FireFox, but that didn't solve the problem. I also tried changing themes, to no avail. Is this a bug or is there some setting I can change? Other stuff that may or may not be relevant: I have the awesome bar, URL bar, and all of my menu icons (sans text) on one line. I have the text menu bar also visible. I'm running Windows 7 Ultimate, 1152x864 res with text at 125%. I always have at least a couple of tabs pinned. On another computer I use (Windows 7 Home Premium, 1366x768 res, 100% text, also always have something pinned), I do not have this problem. However, on that computer, there is empty vertical space between the tabs bar and the bookmarks bar, as if another bar should be there (see second screenshot). I realize these may be two separate issues, but then again, they both seem to suggest an overflow issue, so maybe not.